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Note 3 - Notes Payable And Long-Term Debt (Detail) (USD $)
 0 Months Ended 1 Months Ended
Apr. 30, 2008
Jul. 31, 2007
Jul. 31, 2012
sqft
Jul. 12, 2012
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)   $ 5,500,000   $ 4,000,000
Area of Real Estate Property (in Acres and Square feet)     23,000  
Proceeds from Bank Debt (in Dollars)   $ 4,050,000    
Debt Instrument Maturity Period 10      
Debt Instrument Amortization Period 20 years      
Debt Instrument, Interest Rate, Stated Percentage 7.10%      
Building [Member]
        
Area of Real Estate Property (in Acres and Square feet)   191,000    
Land [Member]
        
Area of Real Estate Property (in Acres and Square feet)   30